Windy and unfavourable weather conditions have put efforts to fight a large fire south of Invercargill on hold.
The fire at Awarua has burnt through more than 1300 hectares of conservation wetlands.
Strong winds have grounded helicopters, and firefighters stopped activity around 10am.
Fire and Emergency's Mark Mawhinney said a few hotspots remain with no visible flames.
He said thermal imaging drones will be used once conditions ease, and the plan is to strengthen the perimeter to prevent the fire from spreading.
Mawhinney said there will be 30 to 40 firefighters and six aircraft working on the fire tomorrow.